Oil reclaiming apparatus



March 4, 1941. DOYLE 2,234,111

011. RECLAIMING APPARATUS Filed 14, 1939 3 Sheets-Sheet 1 Inventor fig/e March 4, 11. P. J. DOYLE OIL RECLAIMING APPARATUS Filed Aug. 14, 1939 S-Sheets-Sheet 2 A tiomeys March 4, 1941. p J DQ'YLE 2,234,111

OIL RECLAIMING APPARATUS Filed Aug. 14, 1939 3 Sheets-Sheet 5 Inventor 2- mwi P A iiomeys Patented Mar. 4, 1941 UNITED STATES PATENT OFF-ICE 01L RECLAIMING APPARATUS Paul Joseph Doyle, Cleveland, Ohio Application August 14, 1939, Serial No. 290,124

1 Claim.

The present invention relates to an apparatus for decolorizing, neutralizing and absorbing the carbon, asphalt, water and other foreign substances from processing oil, such as used on cold strip mills during cold steel rolling and returning the oil to its original state so that the same may be again used.

The details of construction, advantages and manner of use of the apparatus will be readily I understood from the following detailed description, reference being had to the accompanying drawings forming part hereof, wherein like numerals refer to like parts throughout and in which:

Figure 1 is an elevational view of the apparatus.

Figure 2 is a vertical sectional view of the agitating tank.

Figure 3 is a transverse sectional view taken substantially on a line 3-3 of Fig. 2.

Figure 4 is a vertical sectional view through the shell of the filter.

Figure 5 is a vertical sectional view through the filtering screen.

Figure 6 is a transverse sectional view taken substantially on a line 6-6 of Fig. 5.

Figure 7 is a. fragmentary vertical sectional view through the spray pipe for feeding the oil to the filter.

Refer-rin now to the drawings in detail, and with particular reference to Fig. 1 of the drawings, the numeral 5 designates a pipe leading from the sump within which the used oil is collected, the pipe having a control valve fixed therein in advance of the pump I. The pipe 8 leading from the pump passes through a casing 9 within which is arranged a heating coil II), the pipe extending from the casing upwardly as shown at II for discharge into a tank I2.

The first step in the processing of the oil is to evaporate the moisture therefrom and this is accomplished by means of an air feed pipe I3 having a control valve I4 therein the air pipe extending downwardly into the tank I2, the bottom of the tank being concaved as shown at I5 and positioned in the bottom portion of the tank and connected to the air pipe I3 is a horizontally positioned spray head I6 including a plurality of arms I'I extending at right angles with respect to each other and having the perforations I8 formed therein for discharging the air upwardly through the oil contained in the tank I2. The air is heated to 125 degrees Fahrenheit and in passing upwardly through the oil the moisture is absorbed and the oil in the tank I2 is treated by the heated air until all of the moisture has become evaporated from the oil therein.

During the evaporating process the tank I2 is supplied with powdered fullers earth, which remains in the tank and becomes agitated by the oil through the air passing upwardly therethrough, for a period of approximately one hour which is usuall sufficient to completely evaporate the moisture from the oil. Communicating' 10 with the bottom of the tank I2 is a drain pipe I9 having a control valve therein and in advance of the valve is a branch pipe 2| which communicates with the pipe 5 leading to theintake side of the pump I. A control valve 22 is positioned 15 in the pipe 2| in advance of the pipe 5. In the pipe II is also positioned a control valve 23 and in advance of this valve is a branch pipe 24 leading to a filter designated generally at 25.

The filter is shown in detail in Figs. 4 to 6 inclusive and comprises a shell 26 open at its top and provided with a cover plate 21 through which the discharge pipe 28 is extended, the latter being connected to the branch pipe 24. The pipe 24 in advance of the extension 28 is likewise provided with the control 29. Also connected in the pipe extension 28 is a check valve 36 as well as a pressure gauge 3|.

Suspended in the shell 26 is a cylindrical screen 32 which is closed at its bottom by a cap 33 and open at its top to receive the pipe extension 28. To the upper end of the screen 32 is secured a flange 34 by means of which the screen is supported in a suspended position within the shell 26 on the upper edges of the latter. The pipe extension 28 extends downwardly into the screen 32 and is provided with perforations 35 for discharging the oil and fullers earth carried thereby against the side walls of the screen 32.

The sides of the screen 32 are spaced from the walls of the shell 26 and accordingly the oil passes through the screen into the shell and is returned to the tank I2 by means of a pipe 36 which communicates with the pipe II. A control valve 31 is interposed in the pipe 36 in advance of its connection with the pipe II.

The oil is recirculated through the filter, in the manner above explained, until the fullers earth is completely removed therefrom and the desired color returned to the oil. Likewise the screen removes all dirt, carbon and other foreign matter from the oil.

Also connected to the pipe 36 is a. branch pipe 38 having a control valve 39 therein and leading 55 to an open tank 40 into which the pipe as discharges. Extending from the tank 40, adjacent its bottom, is a pipe 4| having a control valve 42 therein and connecting with the branch pipe 2| leading to the intake side of the pump 1. The tank 40 is adapted to contain a solution for coating the screen 32 and accordingly with the valves 6, 22, 23 and 3'! closed the solution may be pumped from the tank 40 into the filter and through the screen and again returned to the tank 40.

Connected to the pipe 8 at the discharge end of the pump is a pipe 43 having a control valve 44 therein and leading to a storage tank. The pipe 8, beyond the pipe 43 is likewise provided with a control valve 45.

Also entering the top of the tank 40 is an air feed pipe 46 having a perforated spray head 41 connected to its lower end and positioned horizontally adjacent the bottom of the tank to agitate the solution contained therein.

The'solution in tank 4|] is a mixture of a few pounds of powdered fullers earth and new oil. This solution is well mixed in tank 40 then circu'lated from tank 40 through the filter and back to tank 40 again leaving a thin layer of fullers earth on the screen, which is called a pre-coat. The purpose of this pre-coating is to lower the surface tension on the screen before the mixture of dirty oil and fullers earth is pumped through the filter from tank l2. This pre-coat of fullers earth packed right next tothe screen acts to keep the foreign matter in the dirty oil from plugging the pores of the screen, and therefore gives a lo longer filtering cycle.

What is claimed is: An oil reclaiming apparatus comprising in combination a tank adapted to contain a. predetermined quantity of the oil to be reclaimed and apredetermined quantity of fullers earth in intimate contact with the oil, means for forcing heated air upwardly through the contents of the tank to evaporate moisture from the oil, a filter including a closed shell having a foraminous member spaced .from the walls of the shell, a pipe connecting the bottom of the tank with the interior of the foraminous member, a pump in said pipe, a pipe leading from the shell to the tank to deliver filtered oil to the top of the tank, a valve in said pipe between the tank and the pump, a valve in the pipe between the pump and the filter, a solution tank containing a coating solution for the filter, a pipe connecting the solution tank to the intake end of the pump at a point between the first-named valve and the pump, a branch pipe extending from the pipe leading from the shell to said solution tank and valves in the pipes leading to and from the solution tank, said pipes and valves providing independent recirculation systems between the first named tank and the filter and between the solution tank and the filter, both of said systems being connected with the pump for selective circulation of the oil and the solution to and from the filter-either separately or in selected proportions depending upon the degree ofimpurity of the oil to be reclaimed.

PAUL J. DOYLE. 

